Final answer:
The EMT uses the Patient narrative section to add more detailed information to a PCR.
Step-by-step explanation:
The section used by the EMT to add more detailed information to a PCR is the Patient narrative section. This section allows the EMT to provide a detailed account of the patient's condition, symptoms, and the actions taken during treatment. It helps to document the chronological sequence of events and provides valuable information for further analysis and review.